By Sam Frost Change is afoot behind the scenes at Crystal Palace with owner John Textor and Eagle Football Holdings exploring the sale of their stake in the club. And it could open the door for NFL billionaire Josh Harris to take control. Harris owns the Washington Commanders and NBA franchise the Philadelphia 76ers, as well as 18 percent of the South London club. Textor, according to The Independent, wants out at Selhurst Park and is minded to sell all of his 45 percent stake in the Eagles. Per the report, bidders interested in buying out Textor would only proceed if they could acquire a majo…